B. Hardan, J. . Patil, A. . Bachhav, and A. . Chaudhari, “Approximate fixed points for $n$-Linear functional by $(\mu,\sigma)$- nonexpansive Mappings on $n$-Banach spaces”, J. Math. Anal. Model., vol. 1, no. 1, pp. 20–32, Dec. 2020.